Surfaces; 
All surfaces supplied are in TWT and in the Zmap file format.

TWT_Bathymetry – Sea bed  data was acquired from EMODNet in metres, and converted to TWT with a water velocity of 1494m/s. Data is cropped to the same extent as NSMR2
Base_Cenozoic.Zmap – As the name describes 
Base_Chalk.Zmap – Note not the base of the Cretaceous, but rather the base of the Cretaceous chalk unit (for velocity model purposes)
Base_Jurassic.Zmap – As the name describes
Top_Zech.Zmap – Top Zechstein for all areas of the NSMR2, including salt structures and rollers. Multi-Z interoperation not undertaken for complex salt geometries. For most parts synonymous with base Triassic
Z3_Surface.zmap – Z3 reflector traced and surface made. Incomplete and mainly mapped in the North of the NSMR2 where data is best
Base_Zech.zmap – As the name suggests base Zechstein. Heavily faulted